Sorting Device Airflow Velocity Distribution for Resin Sorting
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Solution Overview
Problem
Conventional sorting devices face challenges in accurately sorting three types of resin materials due to flight variation issues, which limit the installation of multiple nozzle groups and decrease shooting accuracy, especially when the flight distance exceeds 500 mm.
Innovation Solution
The sorting device employs a configuration with a conveyor, identification part, air blower, upper and lower rectifying plates, and multiple injectors, where the air blower generates an airflow with a wind velocity distribution that matches the fall velocity, minimizing air resistance and allowing for the installation of at least three nozzle groups, thereby suppressing flight variation and enabling simultaneous sorting of three resin types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flight distance is extended to install at least three nozzle groups for sorting three resin types, then the sorting capability is improved, but the flight variation increases and shooting accuracy decreases
Solution Approach 1:
The patent changes the wind velocity parameter along the flight path by introducing a wind velocity distribution that increases from the upstream end to the downstream end of the flight path. This parameter change compensates for the accumulation of flight variation over extended distances, allowing three nozzle groups to be installed while maintaining shooting accuracy. The wind velocity distribution is specifically designed so that the ratio of maximum wind velocity to wind velocity near the conveyor surface is between 2 and 10, which effectively suppresses flight variation despite the extended flight distance.
2Productivity
If the flight distance is extended to install multiple nozzle groups, then the sorting of multiple resin types is enabled, but the flight variation accumulates and decreases sorting precision
Solution Approach 1:
The patent implements a wind velocity distribution that varies along the flight path, with wind velocity increasing from upstream to downstream. This parameter change allows the system to maintain sorting precision across extended flight distances required for installing three nozzle groups. The specific ratio constraint (2-10) between maximum and minimum wind velocities ensures that flight variation is suppressed sufficiently to maintain high sorting precision while enabling the productivity improvement of sorting three resin types simultaneously.
3Ease of operation
If a uniform wind velocity is used along the flight path, then the system is simple to operate, but flight variation is not suppressed and shooting accuracy decreases
Solution Approach 1:
The patent applies local quality by creating a non-uniform wind velocity distribution along the flight path, where different sections have different wind velocities tailored to local requirements. The wind velocity is higher at the downstream end where flight variation accumulates more, and lower at the upstream end. This localized adjustment of wind velocity effectively suppresses flight variation in each section, maintaining shooting accuracy without requiring complex operational procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces flight variation and improves shooting accuracy, allowing for the simultaneous sorting of three resin types with high purity and collection yield, even at extended flight distances.
Implementation Method 1
the air blower generates an airflow with a wind velocity distribution that matches the fall velocity, minimizing air resistance
Implementation Method 2
upper and lower rectifying plates, where the air blower generates an airflow with a wind velocity distribution
Implementation Method 3
The plurality of injectors are disposed above the flight path so as to be directed to the flight path, and inject pulse air to the specific material type matter flying from the conveyor
Implementation Method 4
The conveyor conveys the sorting objects in a placed state in one direction, and causes the sorting objects to fly at a forefront portion of the conveyor
Data Source
AI summary
At a conveyor forefront portion, velocity distribution of an airflow is provided. The velocity distribution is wind velocity distribution in a vertical direction of an airflow from a surface of an upper rectifying plate to a surface of a conveyor at the conveyor forefront portion, and has a maximum value in a range of less than 10 mm downward of the vertical direction from the rectifying plate surface. Moreover, a ratio obtained by dividing the maximum value by a wind velocity in the vicinity of the surface of the conveyor is 4 or more, and 12 or less. In a range other than the range of less than 10 mm, the airflow has a wind velocity equal to the wind velocity in the vicinity of the surface of the conveyor.